Improvement in liquid-meters



771 vwl/Ofi N. PETERS, PHOTOLITHUGRAFHER. WASHINGTON. D C.

' made of or lined with. brass or waited' gisten encanta;

Letters Patent No. 103,990, .dated June 7, 1870.

IMPROYEMENT IN LIQ UIIJ-Iil/.l'lTERE.V

The Schedule refexred ,to in these Letters Patent and making part ox' the same.

I, `ROBERT GREUZRAUR, of the city of Brooklyn, E. D., in the county of Kings and State of New York,

have invented certain Improvements in Fluid-Meters, of which `the followingis a specification.

Nature and Objects of the Invention.

to obtain a minimum of friction and resistance.

As to ease of construction and low cost-first, by the use of such form, arrangement, and packing as gives' to the body of the meter and to the main piston an advantageous shape for cheapl manufacture, and which does away with the necessity of their being other non-corrosive metals; second, by the arrangement herebelow described, which results innitilization of' space and material, and avoids outside channels with their consequent diiicult construction and waste of material.

Figure l is a longitudinal `section, mostly vertical, through theline A A', iig. 3.

Figure 2 is a horizontal longitudinal sect-ion. v

Figure 3 is a cross-section through BB', tig. l.

Figure 4 is a cross-section through C C', fig. 1.

Figure 5 is a 4section across the pipe .G and the valve H.

General Description..

The two parts D D, E E, bolted together through tlangesd and e, form the Outside shell, which is usually made of iron.

F is the piston, also made of iron.

Within the end D of the shell is the stationary pipe G, generally of brass, into which the ports y g, g1 gl, anld passages g2 g2, iig. 2, are cut in pairs on opposite su es.

The'pairof ports g-g connect with the .rear or left side of the piston F, andV the' pair g1 g1 connect with the fronty or right end of the said piston, and alternate-ly they connect, through the inside of the valve H and its sleeve stem h1, with the outlet-nozzle K,and

also alternately with the inlet-nozzle'J, through pipe G,

and through the spaces h between the said valve H, as indicated by thearrows.

The inlet-nozzle J, which is set into yshell D by castpipe and ing the latter around the same, serves for guide to the lvalve 1I, which slides upon its closed end Jf.

The outlet-nozzle K is set in t same manner into cover L, and guides the sleeve-stem hl, which slides within'the same.

Attaching those nozzles to the ends of the `meter gives the latter-a more favorable position, by placing it in a direction coinciding with that-of the pipes leading to and from the same. p

The valve H plays over the ports f/ g and. yl g with its segmental parts 'h2 h2, figs. 2 and 5.

The open spaces 7i h3 between these parts lead into the sleeve-stem 711.

Between these segmental parts 712 il? the two outside Open spaces i, on opposite sides, figs. l'and, carry the feed-fluid past the valve, so as to give it communication with ports g' y1 and passages g2 g2. g

The two pins h5, fig. 5, prevent the valve from turning. Y

rlhe piston-valve M, which is firmly fastened upon the sleeve-stein h1, has two ports, in?, iig. 3, and slides within the piston-valve N.

That part of the sleeve h1 which is inclosed by the l piston-valve )I is perfinated, so that the fluid entering the piston M may escape through the sleeve IL, as

shown by the arrows.

lhe annular piston-valve N slideswithin cylinderl P and upon piston-valve M. lhis piston-valve Nhas. also two ports, nl, on opposite sides, and in positions at right angles to the ports on', as shown in fig. 3.

This piston N is fastened by a knob, a3, to` a rod,

Q, iig. 1, which slides through the partition Q', and

serves the purpose herehelow named.

This knob a slides in slot p, of'cylinder P.

' The piston F is packed with rubber rolls 1t R',

which cause the piston to `move without leakage and without friction upon the inner surface of shell D and upon pipe G. These surfaces, as well as the piston itself, require no finish.

The piston-valve N is divided, around its circumference, into four parts, by the four ribs a, fig. 3.

T-he two opposite partitions thus formethwhich embrace the two ports al, are in constantcommunicat-ion wit-h 4the feed-fluid through the two oppositeports p2 in cylinder P, which, 4through channels p3, connect with inlet-passages g2 g'2 above named.

SS represent rubber or other abutmcnts upon which the pist-on M cushions. V

The operation of the meter is as follows:

Let the space between the valve and'valve-stem H h* and the pipe Gr contain the feed-fluid, and the valve Vothers ports .nl on. Y

tou-valve N is carried past the piston-valve M by pisj H and its stern h1 the escape-fluid. In the position shown ingrjl, the feed enters through ports g g and presses uponthe rear. of the piston F, while theiluid in front of the piston escapes through ports gl g, and through the valve and its stem.

The feed-fluid also passes through passages g2 g, p2 pz, and ports 'nl n, to the left of valve-pistons M N.v

As the pistpu Fmoves to the right, the pistonvalve N, then no longer held by the piston F through rod Q, and having escape-fluid on its right and feedluid on its left, can now advance to the rightvuntil the pistons NM stand over each other and close each Thus they remain until the-piston F, through rod Q, far enough to open the ports of M N on opposite sides.

The pistonF having arrived at the end of its stroke, and slightly cushioned upon its rubber rolls R,-the pressure ofthe lluid finds vent by directing its course upon piston M, while the piston N is held by rodQ, as 'shown in fig. 1. Piston M thus moves into or toward the position shown in g. 1, taking the valve H with it, and thus reverses the ports for the main piston F.

Toward the other end of the stroke, piston F carries the rod Q by knob f.

It is evident-that with sorse slight modifications the course of the huid may be reversed, with, however, au inferior result. It is also evident that'any kind of a piston may be substituted for the piston F ,and its rubber rolls, with metal, leather, or any other packing, involving, however, increased cost and less efflciency. p The amount of fluid-displaced by the main piston F and the auxiliary piston-valves MN constitutes the quantity measured and to be recorded by the counters. When a small stream is passed through a meter there is generally a considerable amount of leakage, particularly in unbalanced meters, which may be taken advantage of to obtain more uid than the counters indicate... Inthismeterauy attempt to benefit by such leakage is frustrated, because the pressure on,

all moving parts is balanced, keeping' down friction, and because the auxiliary valve-pistons M N do not lmove to the end of their reach under a small stream,V and thus decrease the amount passed through per revolution.

The counters receive motion from rod Q. As this rod, together with valve-piston N, does not travel to the end under a small stream, a special provision is necessary to give proper motion to the counters, arranged as follows: f

The shaft 1 of ratchet-wheel 2, figs. 2.and 4, has an 4upper bearing in `bushing 3, and a lower bearing in knob 4 4 cast onto.cyliuder P.

Leakage through the upper bearing is prevented by washer 5, ground to a true joint upon the bushing 3, andtting loosely upon the shaft; and by rubber washer 6, which lits closely around the shaft, prevents the passage of uid along the latter, and permits the washer 5 to accommodate itself to the face ofthe bushing 3 without reference to any Obliquity in the shaft l. Thepressnre of this rubber washer upon the shaft of the ratchet-wheel prevents the lat` terfrom returning on its path, and thusY avoids'vthe" use of a check-dog for that purpose.

The arm turns loosely upon the hub of the wheel 2, and has its slotted en d supported by leverS, the end pin 8l of which plays' in that slot, and causes the arm 7 to turn.

. This arm 7 carries adriver, 9, swinging loosely upon p Lever 8 is'pivoted in the aforesaid knob 4 4', and its slotted end, 82, is carried by a pin or knob, n3.

The result of this arrangement is that arm 7, with its driver, receives 'nearly' all its motion while rod Q passes the central part of its full play, its motion near either end adding little to the motion of the arm. Thus, if rod Q should only move 4over one-third of its full path, the driver 9would still have a greater reach than one toothv on the ratchet-wheel, while if rod Q travels its full stroke the driver will still have less reach than two teeth.

To support the counters and their cover, I use a 4loose plate, T, instead of-forming the body of the meter into a shape to receive the same, thereby gaining labor and material.

The counter cover V 1 fasten on one side by the studV, which enters lng t', and ou the other side by a usual screw, W, a mode which saves time, labor, and material. A

The-drawing shows that the peculiar shape adopted for the part D of the shell adapts it to be castbon end, so as to forni its own core, resulting in a true casting with a suitable surface for the rubber roll to travelupon.

The part E is also cast on end, with cores for chan- .nels p.- Itsrlip e2 serves the double purpose of guide to piece D, as well as abutment to the ring R.

Claims.

1. The combination with the cylindrical shell D E of the end nozzles J and K, having their axis parallel A to that of the shell, and of supply and exhaust-passages within the shell leading in adirection parallel to its axis, substantially as described.

2. The supply and exhaust-passages in a fluid-meter', passing centrally through the same in the direction of its long or major axis, as shown in the combination of the shell D E, nozzles J and K, and the passages H, h1, and G G, substantially as described.

3.Thc combination of the cylinder P with annular valve-piston N and valve-piston M, and their ports, operating substantially as and for the purpose hereinbefore set forth.

4. The combination of a' casing, G, and its ports, with the segmental valve H and its ports and passages, operatiug substantially as and for the purpose hereinbefore set forth.

5. The combination of shell D E and piston F with cylinder P, valve-pistons M and N', sleeve G, valve H, and their ports andpassages,substantially as and for the purpose hereinbefore set forth. l

6. The loose counter supporting-plate T, placed tnngentially to the circumference or sides of the metershell, in combination with the bushing-box 3 and shaft 1, substantially as described. I.

7 The combination with a 'ratchet-wheel, 2, and a driver-carrying arm,.7, in a fluid-meter, of a motiontransmitting lever, 8, substantially as and for the 'purpose hereinbefore set forth.

8. The combination wit-h apiston, F, packed with one. or more rubber rolls, R, of a meter-cylinder or shell formed of two parts, D and E, when the latter are so joined that: the-lip 'e2 serves as a retaining-riug to lrub` ber roll R, substantially as and for the purpose hereinbefore set forth.

Witnesses:

.. ADOLPH MAHLER,

J'osIArr W. KIRK.

ROBT. C REUZBAUR. 

